My g/fs 95 Civic LX was having some brake problems the other day... It would brake fine, decent pressure, but as she held it, they would slowly drop to the floor... So I did some searching on here, and came to the conclusion it must the master cylinder... So changed it with a used one I had that, Im pretty sure was good (it was a 7/8 from a CRX Si)... Bled the system... It seemed fine, she drove it to work (delivers pizzas so she drives it alot)... And a couple hours later it started something new... It was like the longer she drove it the less pressure she had and the more the pedal would travel before it stopped... So I bled it again, this time with a speed bleeder from Advance and same thing... So I changed it one more time with a brand new OEM (reman) master cylinder, bled the system again, and still excessive brake travel... When I bleed I go pass rear, driver rear, front pass, and drivers front in that order...

I checked the booster with a pressure guage, its keeping pressure... But could it still be bad? Its really the only thing left... But I always thought it was the opposite, with a bad booster its hard to press the brake not less pressure... Anyways, im ready to throw in the towel on this thing, can someone please help me out?

 

Hopefully someone experienced will help you. It does sound like a master though. Or at least from what I have read elsewhere. I dont know about a civic, on the integra, I think a manual said that it was driver front passenger front passenger rear and then driver rear. Dont know how much that even makes a difference. Good luck.

 

try bleeding them again and check for leaks while your at it. Is the fluid level ok?

 

I think Ive bled them 5 times... Fluid level is fine, I top it off at each wheel... And as far as I can tell, there are no leaks... Its really frustrating me...

 

did u bench bleed the master cylinder b4 you installed it? thats a must

 

No, I figured a thorough bleeding of the system would be sufficient... Thats what I keep hearing anyways... How do I properly bench bleed the MC?


Scratch that, I just looked it up, and I now feel that THIS is my problem! Thanks for the info guys! Tomm I will bench bleed and then rebleed the whole system...